当负载要求提供一种完全隔离保护条件时,应选用()不间断电源。 A.后备式 B.三端口

题型:单项选择题

问题:

当负载要求提供一种完全隔离保护条件时,应选用()不间断电源。

A.后备式

B.三端口式

C.互动在线式

D.串联在线式

考点:仪表工考试高级仪表工高级仪表工题库
题型:单项选择题

三. 句型转换 ( 10分)

1. Canada is a country in which many cultures exist together.

Canada is ________ _________ _____________.

2. Rather than take the aeroplane all th way, they decided to fly from China to Vancouver and to take the train from west to east across Canada.

They ______ ______ fly from China to Vancouver and take the train from west to east across Canada in September than take the aeroplane all the way.

3. The school gave an order.  All the classrooms should be cleaned today.

The school gave an order _____ _____ _____ _____ _______ be cleaned today.

4. The fact that ocean ships can go there surprises many people.

Many people ________ _________ ________ the fact that ocean ships can go there.

5. His words made a strong impression on us.

We ________ deeply __________ ____________ his words.

题型:单项选择题

领导方式的主要理论有()。

A.管理方格理论

B.连续统一体理论

C.期望理论

D.激励强化理论

E.权变理论

题型:单项选择题

如何理解城市基础设施的系统性?

题型:单项选择题

某工程在混凝土施工过程中,由于称重设备发生故障,导致工人向混凝土中掺人超量聚羧酸盐系高效减水剂,导致质量事故。该事故应判定为( )。

A.社会原因引发的事故

B.操作责任事故

C.技术原因引发的事故

D.管理原因引发的事故

题型:单项选择题

为什么要“控辍保学”?

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